Open a custom form by updating regXML in dbRegInfo table

I’d like to replace the screen SCRASSEDIT with a custom screen called udSCRASSEDIT (SCRASSEDIT opens when I click the Edit button on the Associate tab in a matter)I have updated the regXML field in table dbRegInfo and the field now looks like this. UDSCRASSNEW UDSCRFEEMAIN UDSCRASSEDIT I’ve cleared my cache but I still get SCRASSEDIT opening and not udSCRASSEDIT. Can anyone help?

it could be the search list is hard coded to this and not using an over-ridable screen

I checked, and the Edit button is a Service which calls CMDGETASSOCIATE. Where can I find CMDGETASSOCIATE to see if anything is hardcoded?